Hello, Vaibhav,
Thank you for reaching out to us.
Please read this article – https://www.8theme.com/documentation/xstore/woocommerce/product-images/
It is recommended to use a graphics editor and prepare product images (make them the same size) before uploading images to your media gallery and for products. In other cases, images may have different heights on the frontend, and the Crop option can be useful in this case.
Best Regards,
8Theme’s Team